Automobile bumper



April 24, 1928. i

F. G. BREMER AUTOMOBILE BUIPER Filed July 20. 1927 Patented Apr. 24,1928.

UNITED v STATES PATENT wiser.

FREDERICK e. BRnMEncr :enrseoaemrnnnsvzmam, nssleuon To UNIT-ED STATESCHAIN & FORGING COMPANY, OF PITTSBURGH, PENNSYLVANIA, COB- rorm'rron OFDELAWARE.

Application filed July h ly invei-ition relates to automobile bumperstructures such as are enr-iployed. at the front and rear ends of motorvehicles for absorbing the force of; impacts.

:One object my invention is to provide an improved manner of yieldablysupporting impact bars of the rigid type.

Another object of my invention is to proi'idean improved form ofbutfersprings for automobile bumpers.

One form which my invention may take is shown in the accompanying.drawing,

wherein Figure 1 is a plan view of the bumper structure mounted upon thefor- Ward portion of .a vehicle frame,- and Fig.

bolts 5, the distance between the heads of the bolts 5 and the normalposition of their nuts 6 being greater than the width of the bracketarms4. i

An impact-receiving bar 7 which is shown as tubular in cross section,but which may be of various other forms, is supported to clampingcollars 8, whose lower ends are spaced apart to receive the forward endsof butler spring members 9 and. 10 that are held in place by a clampingbolt 11, the rear ends of these members being held in place on thebracket arms 4 by the bolts 5, and preferably have slight pivotalmovement thereon when the impact bar 7 is deflected in an endwiscdirection; The bracket arms 4 resist such deflection and, by reason oftheir resiliency,

will return to their normal positions upon removal of the obstruction.Rivets 12 are provided for holding the springmembers 9 and 10 in unitaryrelation, independently of the bolts 5 and 11. The spring-like members9,10 and 4 combine to form a yieldable impact-receiving structure ofconsiderable resilience, and the shape of the springs 9 and 10 is suchthat the bar does notpr i ver a pla t standing the number of springelements em- AUTOMOBILE BUMPER.

1927. semi No. 201,176.

jectj forwardly "of tl'ieivehicleframe a great distance compared to thelength of the spring members. It'isadesira-ble to maintain t e overalllength of the vehicle, including the bumper structures, withinreasonable limits, Without the sacrifice of capacity for absorbingimpacts. 7

It will be seen that the members 9 and '10 supplement or oreinforce oneanother, particularly at their upper ends, where the greatest straincomes, through tendency of the bar. 7 to rock on its support when itengages an obstruction, and that the mounting of the rear ends of thespring members 9 and 10 in relatively spaced relation serves to bracesuch rear ends against \dlSIOIfUOII,

Furthermore, notwithployed and the pivotal connections afforded by thebolts 5 and 11 which permit deflections under certain conditions,without dis-i tortion of any one of the members, the form andarrangement of the spring members 4, 9 and 10 are such as to cause theparts to readily assumetheir normal positions upon removal of impactforce fromthe buffer bar 7.

1 claim as my'invention: 7

1. Bumperstructure comprising a bumper bar, two curved buffer springsconnected at their outer ends to said bar, and means for pivotallyconnecting the inner ends of said springs to a vehicle frame, onvertical axes.

2. Bumper structure comprising a bumper bar, a curved buffer springconnected at its outer end to said bar, and means for pivot allyconnecting the inner end of such spring to a vehicle frame.

3. Bumper structure comprising a bumper bar, two pairs of curved bufi'ersprings whose outer ends are-in overlapping relation, means forconnecting said outer ends of each pair to a bumper bar, and means forpivotally connecting the inner ends of each pair of said springs to avehicle frame, the intermediate portions of each pair of the springsbeing spaced apart.

4:. Bumper structure comprising a bumper bar, two pairs of curved buffersprings Whose outer ends are in overlapping relation, means forconnecting said outer ends of each pair to a bumper bar, and means forpivotally connecting the nner ends of each pair of said springs to aVehicle frame, the intermediate portions of each pair of the springsbeing spaced apart and curved on diiterent radii.

5. Bumper structure comprising a bumper bar, two pairs of butter springsconnected at their outer ends to said bar, a support for the inner endsof each pair of springs, and means for connecting the inner ends of eachpair of springs to the upper. and lower sides,

: respectively, of one of the said supports.

(5. Bumper structm'e comprising a pair oi bracket arms for attachment toa vehicle frame, a butter spring pivotally connected to the outer end ofeach of said-ar1ns,a'

butter bar, and a connection between said bumper bar and each of saidlinrl'l'er springs.

T. Bumper structure con'iprising a pair of lnachct arms for attachi'nentto a Vehicle frame, a pair oi butter spring members pirotally com'iectedto each of said arms at the upper and lower siiflcs ol? said arn'is, abump r bar, and means for connecting the outer ends of each pair ofbutter springs to the bumper bar.

8. Bumper structure con'iprising straplike supporting arms of yieldablematerial and curved intermediate their ends, butler springs connected tothe forward ends of said arms, and a butter bar connected to said butlersprings.

9. Bumper structure con'iprising supporting arms of yieldable materialand curved intermediate their ends, butl'er springs connected to theforward ends ot'said arms, and a butter bar connected to said buit'ersprings, the said springs being curved in a plane at right angles to theplanes in which the bracket arms are curved.

l0. lhunper structure comprising support ing urine of yieldable materialand curved intermediate their ends, bull'cr springs connected tov theforward ends of said arms, and a butter bar connected to saidbutler-springs,

the bracket arms being curred in vertical FREDERICK G. BREMER.

